Quartz tube reactor suitable for gas-solid phase catalytic reaction
By using a multi-layer tube structure and quartz material made of quartz tubes in a fixed bed reactor, the problems of heat transfer and temperature control difficulties and interference with reactor materials are solved, and efficient heat transfer and reaction efficiency are achieved.
Patent Information
- Application Number
- CN202421287287.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-06-06
AI Technical Summary
Due to the poor thermal conductivity of the catalyst support, the fluid flow rate is limited by the pressure drop, which leads to difficulty in heat transfer and temperature control. At the same time, the stainless steel reactor material has interference with the low-carbon alkane dehydrogenation reaction.
A multi-layer tube structure reactor made of quartz tubes can simultaneously exchange heat through the inner and outer sides to improve the heat exchange efficiency of the reaction chamber, and use quartz material to avoid interference.
It realizes efficient heat transfer and temperature control, reduces interference to the dehydrogenation reaction of low-carbon alkanes, and improves the accuracy of reaction efficiency and catalyst characteristics research.
Smart Images
Figure CN222550853U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas-solid phase catalysis, in particular to a quartz tube reactor suitable for gas-solid phase catalysis reaction. Background Art
[0002] Fixed bed reactors are widely used in gas-solid phase catalytic and non-catalytic reactions because of their fast chemical reaction speed, small catalyst dosage and reactor volume, and are particularly suitable for reactions requiring high conversion and high selectivity. In addition, the catalyst in the fixed bed is not easily worn and can be operated at high temperature and high pressure.
[0003] However, the main disadvantage of the fixed bed reactor is that the heat transfer performance is poor. Chemical reactions are always accompanied by thermal effects. The temperature has a great influence on the reaction rate. The reaction process requires timely removal of heat. However, in the fixed bed, the catalyst carrier often has poor thermal conductivity, and the fluid flow rate cannot be too large due to the pressure drop limit, which causes difficulties in heat transfer and temperature control. At the same time, for the gas-solid phase catalytic dehydrogenation reaction of low-carbon alkanes, the catalyst is usually a solid catalyst loaded with metal elements such as Zn, Ga, Pt, Cr, etc. The reaction temperature is usually between 500 and 700 ° C, so the commonly used reactor material is high-temperature resistant stainless steel. However, the metal elements such as Cr and Ni in the high-temperature resistant stainless steel have a certain catalytic effect on the dehydrogenation of low-carbon alkanes at high temperatures. There will be interference in such experimental studies using a reactor made of stainless steel.
[0004] In view of this, this application is hereby filed. Utility Model Content
[0005] The technical problem to be solved by the utility model is that the catalyst carrier of the current fixed bed reactor often has poor thermal conductivity, and the fluid flow rate is limited by the pressure drop and cannot be too large, which causes difficulties in heat transfer and temperature control. At the same time, stainless steel is often used as the reactor material, which has an interfering effect on the dehydrogenation reaction of low-carbon alkanes. The purpose is to provide a quartz tube reactor suitable for gas-solid phase catalytic reactions. Through the arrangement of a multi-layer tube structure, the heat generated in the reaction chamber can be efficiently transferred from the inside and the outside. At the same time, the use of specific materials to prepare the reactor can reduce the impact on the research and experiment of the dehydrogenation reaction of low-carbon alkanes.
[0006] The utility model is realized by the following technical solutions:
[0007] A quartz tube reactor suitable for gas-solid phase catalytic reaction, comprising an inner tube and an outer tube coaxially sleeved, wherein the cavity between the outer tube and the inner tube forms a reaction cavity, and a reaction raw material inlet and a reaction raw material outlet are respectively arranged at both ends of the reaction cavity;
[0008] The inner cavity of the inner tube forms a heat exchange cavity;
[0009] The outer part of the outer tube is also coaxially sleeved with a heat exchange outer tube, the cavity between the heat exchange outer tube and the outer tube forms a heat exchange outer cavity, the two ends of the heat exchange outer cavity are respectively connected to the two ends of the heat exchange inner cavity, and the heat exchange outer tube is respectively provided with a heat exchange medium inlet and a heat exchange medium outlet;
[0010] The inner tube and the outer tube are both made of quartz tube.
[0011] The utility model can efficiently transfer the heat generated in the reaction chamber from the inside and the outside through the arrangement of the multi-layer tube structure, and at the same time, the reactor is prepared using specific materials, which can reduce the impact on the research and test of the dehydrogenation reaction of low-carbon alkanes.
[0012] The utility model sets a three-layer tube structure of a heat exchange outer tube, an outer tube and an inner tube, sets the reaction chamber in the middle interlayer, and then sets heat exchange medium chambers on the inner and outer sides of the interlayer respectively. By exchanging heat between the inside and the outside of the reaction chamber at the same time, the heat exchange efficiency of the entire reaction chamber can be improved. At the same time, the utility model adopts quartz material to prepare the reactor. Quartz only contains silicon and oxygen elements and does not show reaction activity in the dehydrogenation process of low-carbon alkanes, avoiding the interference of metal material reactors in the solid-phase catalytic dehydrogenation process of low-carbon alkane dehydrogenation, and has better performance for studying the characteristics of the catalyst in the dehydrogenation process of low-carbon alkane and the characteristics of the reaction itself.
[0013] In a specific embodiment, a catalyst support frame is provided in the reaction chamber.
[0014] In a specific embodiment, the catalyst support frame is in a spiral structure from top to bottom along the axis of the inner tube. The utility model can further improve the efficiency of the reaction by improving the arrangement of the catalyst, and is more conducive to heat transfer, avoiding deactivation caused by concentrated overheating of the catalyst.
[0015] In a specific embodiment, the reaction raw material inlet and the reaction raw material outlet are both connected to the raw material inlet pipeline and the product outlet pipeline through a sealing head.
[0016] In a specific implementation manner, the sealing head is made of metal material.
[0017] In a specific embodiment, the wall surfaces of the inner tube and the outer tube are wavy, which can increase the heat exchange area with the inner and outer layers of heat exchange medium, thereby improving the heat transfer effect inside and outside.
[0018] In a specific embodiment, the width of the wave of the outer tube is greater than the width of the wave of the inner tube, and the depth of the wave of the outer tube is less than the depth of the wave of the inner tube.
[0019] In a specific embodiment, the inner wall of the inner tube and the outer wall of the outer tube are wavy.
[0020] In a specific embodiment, a quartz wool layer is provided on the surface of the catalyst support frame.
[0021] In a specific embodiment, the catalyst support frame is a mesh structure.
[0022] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0023] 1. A quartz tube reactor suitable for gas-solid phase catalytic reaction provided by the embodiment of the utility model can efficiently transfer heat generated in the reaction chamber from the inside and the outside through the arrangement of a multi-layer tube structure. At the same time, the reactor is prepared by selecting a specific material, which can reduce the impact on the research and experiment of the dehydrogenation reaction of low-carbon alkanes;
[0024] 2. The utility model provides a quartz tube reactor suitable for gas-solid phase catalytic reaction, which is provided by arranging a three-layer tube structure of a heat exchange outer tube, an outer tube and an inner tube, and arranging the reaction chamber in the middle interlayer, and then arranging heat exchange medium cavities on the inner and outer sides of the interlayer respectively, and by simultaneously exchanging heat inside and outside the reaction chamber, the heat exchange efficiency of the entire reaction chamber can be improved;
[0025] 3. A quartz tube reactor suitable for gas-solid phase catalytic reaction provided by the embodiment of the utility model is made of quartz material to prepare the reactor. Quartz contains only silicon and oxygen elements and does not show reaction activity in the process of low-carbon alkane dehydrogenation. It avoids the interference of metal material reactor in the process of low-carbon alkane dehydrogenation gas-solid phase catalytic dehydrogenation, and has better performance for studying the characteristics of the catalyst in the process of low-carbon alkane dehydrogenation and the characteristics of the reaction itself;
[0026] 4. The quartz tube reactor suitable for gas-solid phase catalytic reaction provided in the embodiment of the utility model can further improve the efficiency of the reaction by improving the arrangement of the catalyst, and is also more conducive to heat transfer, avoiding deactivation caused by concentrated overheating of the catalyst. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.
[0028] Figure 1 A schematic diagram of the reactor structure provided by an embodiment of the utility model;
[0029] Figure 2A schematic diagram of a partial structure of a reactor provided in an embodiment of the utility model;
[0030] Figure 3 A schematic diagram of a cross-sectional top view of a reactor provided in an embodiment of the utility model;
[0031] Figure 4 This is a schematic diagram of the cross-sectional top view of the reactor provided in an embodiment of the utility model.
[0032] Marks and corresponding parts names in the attached drawings:
[0033] 1-inner tube, 2-outer tube, 3-reaction chamber, 4-reaction raw material inlet, 5-reaction raw material outlet, 6-heat exchange outer tube, 7-heat exchange medium inlet, 8-heat exchange medium outlet, 9-catalyst support frame. DETAILED DESCRIPTION
[0034] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.
[0035] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those skilled in the art that these specific details are not necessary to implement the present invention. In other embodiments, in order to avoid confusing the present invention, well-known structures are not specifically described.
[0036] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0037] In the description of the present invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.
[0038] Example 1
[0039] like Figure 1-Figure 4 As shown, a quartz tube reactor suitable for gas-solid phase catalytic reaction provided by an embodiment of the utility model comprises an inner tube 1 and an outer tube 2 which are coaxially sleeved, wherein the cavity between the outer tube 2 and the inner tube 1 forms a reaction chamber 3, and a reaction raw material inlet 4 and a reaction raw material outlet 5 are respectively arranged at both ends of the reaction chamber 3;
[0040] The inner cavity of the inner tube 1 forms a heat exchange cavity;
[0041] The outer part of the outer tube 2 is also coaxially sleeved with a heat exchange outer tube 6, and the cavity between the heat exchange outer tube 6 and the outer tube 2 forms a heat exchange outer cavity, and the two ends of the heat exchange outer cavity are respectively connected to the two ends of the heat exchange inner cavity, and the heat exchange outer tube 6 is respectively provided with a heat exchange medium inlet 7 and a heat exchange medium outlet 8;
[0042] The inner tube 1 and the outer tube 2 are both made of quartz tubes.
[0043] The utility model can efficiently transfer the heat generated in the reaction chamber from the inside and the outside through the arrangement of the multi-layer tube structure, and at the same time, the reactor is prepared using specific materials, which can reduce the impact on the research and test of the dehydrogenation reaction of low-carbon alkanes.
[0044] The utility model sets a three-layer tube structure of a heat exchange outer tube, an outer tube and an inner tube, sets the reaction chamber in the middle interlayer, and then sets heat exchange medium chambers on the inner and outer sides of the interlayer respectively. By exchanging heat between the inside and the outside of the reaction chamber at the same time, the heat exchange efficiency of the entire reaction chamber can be improved. At the same time, the utility model adopts quartz material to prepare the reactor. Quartz only contains silicon and oxygen elements and does not show reaction activity in the dehydrogenation process of low-carbon alkanes, avoiding the interference of metal material reactors in the solid-phase catalytic dehydrogenation process of low-carbon alkane dehydrogenation, and has better performance for studying the characteristics of the catalyst in the dehydrogenation process of low-carbon alkane and the characteristics of the reaction itself.
[0045] In a specific embodiment, a catalyst support frame 9 is disposed in the reaction chamber 3 .
[0046] In a specific embodiment, the catalyst support frame 9 is in a spiral structure from top to bottom along the axis of the inner tube 1. The utility model can further improve the efficiency of the reaction by improving the arrangement of the catalyst, and is also more conducive to heat transfer, avoiding deactivation of the catalyst caused by concentrated overheating.
[0047] In a specific embodiment, the reaction raw material inlet 4 and the reaction raw material outlet 5 are both connected to the raw material inlet pipeline and the product outlet pipeline through a sealing head.
[0048] In a specific implementation manner, the sealing head is made of metal material.
[0049] Example 2
[0050] like Figure 1-Figure 4 As shown, the embodiment of the utility model provides a quartz tube reactor suitable for gas-solid phase catalytic reaction.
[0051] On the basis of Example 1, the wall surfaces of the inner tube 1 and the outer tube 2 are wavy, which can increase the heat exchange area with the inner and outer layers of heat exchange medium, thereby improving the heat transfer effect inside and outside.
[0052] In a specific embodiment, the inner wall of the inner tube and the outer wall of the outer tube are wavy.
[0053] In a specific embodiment, the width of the waves of the outer tube 2 is greater than the width of the waves of the inner tube 1 , and the depth of the waves of the outer tube 2 is less than the depth of the waves of the inner tube 1 .
[0054] In a specific embodiment, a quartz wool layer is provided on the surface of the catalyst support frame 9 .
[0055] In a specific embodiment, the catalyst support frame 9 is a mesh structure.
[0056] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A quartz tube reactor suitable for gas-solid phase catalytic reaction, characterized in that: It comprises an inner tube (1) and an outer tube (2) which are coaxially sleeved, wherein the cavity between the outer tube (2) and the inner tube (1) forms a reaction chamber (3), and a reaction raw material inlet (4) and a reaction raw material outlet (5) are respectively provided at two ends of the reaction chamber (3); The inner cavity of the inner tube (1) forms a heat exchange cavity; A heat exchange outer tube (6) is coaxially sleeved on the outside of the outer tube (2); the cavity between the heat exchange outer tube (6) and the outer tube (2) forms a heat exchange outer cavity; the two ends of the heat exchange outer cavity are respectively connected to the two ends of the heat exchange inner cavity; and the heat exchange outer tube (6) is respectively provided with a heat exchange medium inlet (7) and a heat exchange medium outlet (8); The inner tube (1) and the outer tube (2) are both made of quartz tubes.
2. A quartz tube reactor suitable for gas-solid phase catalytic reaction according to claim 1, characterized in that: A catalyst support frame (9) is arranged in the reaction chamber (3).
3. A quartz tube reactor suitable for gas-solid phase catalytic reaction according to claim 2, characterized in that: The catalyst support frame (9) is in a spiral structure from top to bottom along the axis of the inner tube (1).
4. A quartz tube reactor suitable for gas-solid phase catalytic reaction according to claim 1, characterized in that: The reaction raw material inlet (4) and the reaction raw material outlet (5) are both connected to the raw material inlet pipeline and the product outlet pipeline through a sealing head.
5. A quartz tube reactor suitable for gas-solid phase catalytic reaction according to claim 4, characterized in that: The sealing head is made of metal material.
6. A quartz tube reactor suitable for gas-solid phase catalytic reaction according to claim 1, characterized in that: The walls of the inner tube (1) and the outer tube (2) are wavy.
7. A quartz tube reactor suitable for gas-solid phase catalytic reaction according to claim 6, characterized in that: The width of the waves of the outer tube (2) is greater than the width of the waves of the inner tube (1), and the depth of the waves of the outer tube (2) is less than the depth of the waves of the inner tube (1).
8. A quartz tube reactor suitable for gas-solid phase catalytic reaction according to claim 6, characterized in that: The inner wall of the inner tube (1) and the outer wall of the outer tube (2) are wavy in shape.
9. A quartz tube reactor suitable for gas-solid phase catalytic reaction according to claim 2, characterized in that: A quartz wool layer is provided on the surface of the catalyst support frame (9).
10. A quartz tube reactor suitable for gas-solid phase catalytic reaction according to claim 2, characterized in that: The catalyst support frame (9) has a mesh structure.